Details: This RFID lock can be easily mounted inside of furniture drawers or cabinet doors unseen to the eye. Perfect for hidden compartments or shop displays and unlockable via the included user cards/ silicone wristband. RFID cards easily access the sensor through up to 1.5" of hardwood or glass.Choose between four AAA batteries or a 5V power adapter to power the unit. Batteries provide a working battery life of up to 50,000 cycles. If battery life starts to get low, a low voltage alarm will sound to indicate a battery change is necessary. Total battery drainage will result in the lock being unable to lock ensuring you will never have a locked out situation. The 5V power jack can also supply a backup power for an emergency lock out situation. Each lock features spring releases that will give the drawer, cabinet etc. a push to open itself. Easy to follow setup instructions included will guide you to use the programming manager key to activate your user cards/silicone wristband. A single card can be programmed to open separate locks. No PC necessary to activate user cards!